Exploited
critical
10
CWE
20
Advisory Published
Updated

CVE-2020-3161: Cisco IP Phones Web Server Remote Code Execution and Denial-of-Service Vulnerability

First published: Wed Apr 15 2020(Updated: )

A vulnerability in the web server for Cisco IP Phones could allow an unauthenticated, remote attacker to execute code with root privileges or cause a reload of an affected IP phone, resulting in a denial of service (DoS) condition. The vulnerability is due to a lack of proper input validation of HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web server of a targeted device. A successful exploit could allow the attacker to remotely execute code with root privileges or cause a reload of an affected IP phone, resulting in a DoS condition.

Credit: ykramarz@cisco.com ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Ip Phone 8865 Firmware=10.3\(1\)es14
Cisco Ip Phone 8865 Firmware=11.0\(1\)
Cisco Ip Phone 8865 Firmware=11.0\(5\)sr1
Cisco Ip Phone 8865
Cisco Ip Phone 8851 Firmware=10.3\(1\)es14
Cisco Ip Phone 8851 Firmware=11.0\(1\)
Cisco Ip Phone 8851 Firmware=11.0\(5\)sr1
Cisco IP Phone 8851
Cisco Ip Phone 7841 Firmware=11.0\(1\)
Cisco Ip Phone 7841
Cisco Ip Phone 7821 Firmware=11.0\(1\)
Cisco Ip Phone 7821
Cisco Ip Phone 8811 Firmware=10.3\(1\)es14
Cisco Ip Phone 8811 Firmware=11.0\(1\)
Cisco Ip Phone 8811 Firmware=11.0\(5\)sr1
Cisco Ip Phone 8811
Cisco Ip Phone 8861 Firmware=10.3\(1\)es14
Cisco Ip Phone 8861 Firmware=11.0\(1\)
Cisco Ip Phone 8861 Firmware=11.0\(5\)sr1
Cisco Ip Phone 8861
Cisco Ip Phone 8845 Firmware=10.3\(1\)es14
Cisco Ip Phone 8845 Firmware=11.0\(1\)
Cisco Ip Phone 8845 Firmware=11.0\(5\)sr1
Cisco Ip Phone 8845
Cisco Ip Phone 7861 Firmware=11.0\(1\)
Cisco IP Phone 7861
Cisco Ip Phone 8841 Firmware=10.3\(1\)es14
Cisco Ip Phone 8841 Firmware=11.0\(1\)
Cisco Ip Phone 8841 Firmware=11.0\(5\)sr1
Cisco Ip Phone 8841
Cisco Ip Phone 7811 Firmware=11.0\(1\)
Cisco Ip Phone 7811
Cisco Ip Phone 8821 Firmware=10.3\(1\)es14
Cisco Ip Phone 8821 Firmware=11.0\(1\)
Cisco Ip Phone 8821 Firmware=11.0\(5\)sr1
Cisco Ip Phone 8821
Cisco Ip Phone 8821-ex Firmware=10.3\(1\)es14
Cisco Ip Phone 8821-ex Firmware=11.0\(1\)
Cisco Ip Phone 8821-ex Firmware=11.0\(5\)sr1
Cisco Ip Phone 8821-ex
Cisco 8831 Firmware=10.3\(1\)es14
Cisco 8831 Firmware=11.0\(1\)
Cisco 8831 Firmware=11.0\(5\)sr1
Cisco 8831
Cisco Cisco IP Phones
All of
Any of
Cisco Ip Phone 8865 Firmware=10.3\(1\)es14
Cisco Ip Phone 8865 Firmware=11.0\(1\)
Cisco Ip Phone 8865 Firmware=11.0\(5\)sr1
Cisco Ip Phone 8865
All of
Any of
Cisco Ip Phone 8851 Firmware=10.3\(1\)es14
Cisco Ip Phone 8851 Firmware=11.0\(1\)
Cisco Ip Phone 8851 Firmware=11.0\(5\)sr1
Cisco IP Phone 8851
All of
Cisco Ip Phone 7841 Firmware=11.0\(1\)
Cisco Ip Phone 7841
All of
Cisco Ip Phone 7821 Firmware=11.0\(1\)
Cisco Ip Phone 7821
All of
Any of
Cisco Ip Phone 8811 Firmware=10.3\(1\)es14
Cisco Ip Phone 8811 Firmware=11.0\(1\)
Cisco Ip Phone 8811 Firmware=11.0\(5\)sr1
Cisco Ip Phone 8811
All of
Any of
Cisco Ip Phone 8861 Firmware=10.3\(1\)es14
Cisco Ip Phone 8861 Firmware=11.0\(1\)
Cisco Ip Phone 8861 Firmware=11.0\(5\)sr1
Cisco Ip Phone 8861
All of
Any of
Cisco Ip Phone 8845 Firmware=10.3\(1\)es14
Cisco Ip Phone 8845 Firmware=11.0\(1\)
Cisco Ip Phone 8845 Firmware=11.0\(5\)sr1
Cisco Ip Phone 8845
All of
Cisco Ip Phone 7861 Firmware=11.0\(1\)
Cisco IP Phone 7861
All of
Any of
Cisco Ip Phone 8841 Firmware=10.3\(1\)es14
Cisco Ip Phone 8841 Firmware=11.0\(1\)
Cisco Ip Phone 8841 Firmware=11.0\(5\)sr1
Cisco Ip Phone 8841
All of
Cisco Ip Phone 7811 Firmware=11.0\(1\)
Cisco Ip Phone 7811
All of
Any of
Cisco Ip Phone 8821 Firmware=10.3\(1\)es14
Cisco Ip Phone 8821 Firmware=11.0\(1\)
Cisco Ip Phone 8821 Firmware=11.0\(5\)sr1
Cisco Ip Phone 8821
All of
Any of
Cisco Ip Phone 8821-ex Firmware=10.3\(1\)es14
Cisco Ip Phone 8821-ex Firmware=11.0\(1\)
Cisco Ip Phone 8821-ex Firmware=11.0\(5\)sr1
Cisco Ip Phone 8821-ex
All of
Any of
Cisco 8831 Firmware=10.3\(1\)es14
Cisco 8831 Firmware=11.0\(1\)
Cisco 8831 Firmware=11.0\(5\)sr1
Cisco 8831

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID for this Cisco IP Phones vulnerability?

    The vulnerability ID for this Cisco IP Phones vulnerability is CVE-2020-3161.

  • What is the severity level of CVE-2020-3161?

    CVE-2020-3161 has a severity level of 9.8 (Critical).

  • Who is affected by the Cisco IP Phones vulnerability?

    The Cisco IP Phones vulnerability affects Cisco IP Phones with specific firmware versions.

  • What is the impact of CVE-2020-3161?

    CVE-2020-3161 can allow an unauthenticated remote attacker to execute code with root privileges or cause a denial-of-service (DoS) condition on an affected Cisco IP Phone.

  • How can I fix the Cisco IP Phones vulnerability?

    To fix the Cisco IP Phones vulnerability, users should update the firmware of their Cisco IP Phones to a non-vulnerable version.

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